基于信息物理系统的电压不平衡度及电能质量分析预警方法研究

Research on Voltage Unbalance and Power Quality Analysis and Early-warning Method Based on CPS

基于CPS(信息物理系统)理论,对地铁供电智能运维系统中设备的三相电压进行监测,并实现三相电压不平衡度的实时计算。将专家经验法及深度残差收缩网络法相结合得到合理阈值,并提出了三相电压不平衡度的预警方案。在此基础上,对三相电压不平衡度的单指标评估模式进行优化,提出了基于熵值法的电能质量多指标评分模型。将三相电压不平衡度阈值优化的方法应用于电能质量阈值确定,最终提供了阈值预警、评分矩阵映射预警、预警等级迁移预警3个层次的预警方案。

Based on the Cyber Physical System(CPS)theory,the three-phase voltage of the equipment in the intelligent operation and maintenance system of metro power supply is monitored,and real-time calculation of three-phase voltage unbalance is realized.A reasonable threshold is obtained by combining the expert experience method and the deep residual shrinkage network method,and an early-warning scheme of three-phase voltage unbalance is proposed.On this basis,the single-index evaluation model of three-phase voltage unbalance is optimized,and a multi-index scoring model of power quality based on entropy method is proposed.The three-phase voltage unbalance threshold optimization method is applied to the determination of power quality threshold.Finally,three levels of early-warning schemes are provided:threshold early-warning,scoring matrix mapping early-warning,and early-warning level migration early-warning.